I like playing lots of different types of games. I prefer games styles that are at least somewhat serious. I need that games to make a t least some sense.

When I GM I like to make the games as open ended as possible. I will provide story lines for the characters, events to get action rolling, and incentives for the party to do %#@&, but I will never tell them they can't do something. Although they should expect reasonable responses to their actions. If they start a fight in the middle of a city, the guard can usually easily over power. Before each time I run the game I try to anticipate what the party might do or might go and try to have such scenarios prepared, although I am pretty good at thinking on my feet if they do something I didn't expect.